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SHARE-BASED COMPENSATION - Summary of Stock Options (Details) $ / shares in Units, $ in Thousands | 12 Months Ended
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Dec. 31, 2016 USD ($) $ / shares shares
2007 EIP |
SHARE-BASED COMPENSATION |
Number of shares of common stock reserved for grants | 691,051
Common stock issued under share-based compensation plan | 253,659
2012 EIP |
SHARE-BASED COMPENSATION |
Number of shares of common stock reserved for grants | 1,200,000
Common stock issued under share-based compensation plan | 583,894
2015 EIP |
SHARE-BASED COMPENSATION |
Number of shares of common stock reserved for grants | 1,100,000
Common stock issued under share-based compensation plan | 0
Stock Options |
SHARE-BASED COMPENSATION |
Expiration term | 10 years
Summary of the stock option activity |
Outstanding at the beginning of the period (in shares) | 144,197
Granted (in shares) | 0
Exercised (in shares) | (5,647)
Expired (in shares) | (71,112)
Outstanding at the end of the period (in shares) | 67,438
Exercisable (in shares) | 67,438
Weighted Average Exercise Price |
Outstanding at the beginning of the period (in dollars per share) | $ / shares | $ 17.98
Exercised (in dollars per share) | $ / shares | 3.39
Expired (in dollars per share) | $ / shares | 12.52
Outstanding at the end of the period (in dollars per share) | $ / shares | 24.96
Exercisable (in dollars per share) | $ / shares | $ 24.96
Weighted Average Remaining Contractual Term |
Outstanding at the end of the period | 4 years 4 months 17 days
Exercisable | 4 years 4 months 17 days
Aggregate Intrinsic Value |
Outstanding at the end of the period (in dollars) | $ | $ 24,220
Exercisable (in dollars) | $ | $ 24,220
Stock Options | 2007 EIP |
SHARE-BASED COMPENSATION |
Number of shares reserved | 30,233
Stock Options | 2012 EIP |
SHARE-BASED COMPENSATION |
Number of shares reserved | 37,205
Stock Options | Minimum |
SHARE-BASED COMPENSATION |
Vesting term | 1 year
Stock Options | Maximum |
SHARE-BASED COMPENSATION |
Vesting term | 5 years
RSU | 2012 EIP |
SHARE-BASED COMPENSATION |
Number of shares reserved | 64,759
RSU | 2015 EIP |
SHARE-BASED COMPENSATION |
Number of shares reserved | 427,417
RSU | Minimum |
SHARE-BASED COMPENSATION |
Vesting term | 1 year
RSU | Maximum |
SHARE-BASED COMPENSATION |
Vesting term | 5 years

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- Definition Aggregate number of common shares reserved for future issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(4) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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